* {
    box-sizing: border-box;
    /* 新加的 */
    margin: 0;
    padding: 0;
  }
  .first-loading-wrp {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    width: 100vw;
  }
  
  .loading-wrp {
    display: flex;
  }
  
  .line {
    width: 60px;
    height: 60px;
  }
  
  .loading-wrp > span {
    background: url('./loading.svg') no-repeat center;
    background-size: 60px 60px;
    animation: rotate 2s infinite linear;
  }
  
  
  @keyframes rotate {
    0% {
      transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -o-transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -o-transform: rotate(360deg);
    }
  }
  
  .first-loading-wrp .title {
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    margin-top: 50px;
  }